Diagnosis of life-threatening systemic lupus erythematosus (SLE); must show at least 4 American College of Rheumatology criteria for SLE; must have severe organ damage in 1 or more organs; must have 1 or more of the following indications of ongoing disease activity: disease activity score (SLEDAI) at least 4, hospitalization for disease activity within 12 months, life-threatening disease not captured on SLEDAI